Pakistan have won the toss and will bat first in the second ODI against the Black Caps in Nelson.
After their 61-run win in the first ODI, via the Duckworth-Lewis method, the Black Caps can extend their current streak to nine with victory in game two in Nelson on Tuesday.
Farkar sustained a contusion to his right thigh while fielding during the first ODI played in Wellington on January 6. Pakistan is the guest team there and they could not understand the field nature clearly. In allotted 50 overs, New Zealand post a challenging total.
Pakistan too, shouldn't be making wholesale changes to their team. Williamson - dropped by Sarfraz Ahmed on 26 - scored at nearly a run a ball, but resisted the temptation to cut loose and felt that paid off.
It was Williamson's 10th ODI ton, his 27th worldwide century and came off 117 balls. However, Pakistan came to chase the score and made 166 runs in 30.1 overs.
Over the past three years they have been beaten 2-0 in two separate series and lost a home series to New Zealand in the United Arab Emirates 3-2.
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83-run stand before Hasan Ali finally removed Munro three balls into the 13th over. Munro, the top-ranked batsmen in Twenty20 internationals, hit 58 from 35 balls to give the hosts a rapid beginning in conditions in which scoring generally required careful application.
Kiwis are one up in the series as the rain helped them win the first game by 51 runs.
But Williamson and Henry Nicholls steadied the ship with a 90-run stand for the fifth wicket before Nicholls was dismissed on 50 by Hasan Ali with just two overs remaining.
But they will have to adjust to New Zealand conditions with overnight rain forecast and strong southerly winds during the day, which could pose problems for top-order batsmen Fakhar Zaman, Azhar Ali and Babar Azam.
Fakhar Zaman (82*) played an nearly completely unassisted knock with partners unable to stay with him in testing conditions for players coming off a run of domestic cricket on flat wickets.